Businessmen and women have been able to get their hands on it for the past 10 days, but starting today AT&T will sell the HTC Tilt2 to us regular folk. The second Windows Phone Windows Mobile 6.5 handset to be offered by AT&T after the Pure, the Tilt2 is available for $299.99 on a 2-year contract after a $50 mail-in rebate or $499.99 contract free. But we have to ask for the sake of stirring up a little Sunday discussion: Considering the fact that all four carriers in the US offer up the Tilt2 in one form or another, why pick AT&T over Sprint, T-Mobile or Verizon?